NutriStack
Berberine and Black Seed Oil, a caution.
Both lower blood glucose, so combined use can produce additive hypoglycemic effects, particularly in people also taking diabetes medications.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.
From the interaction database
What the row says.
Every entry follows the same shape: what is happening, the mechanism, the recommendation, and the primary literature.
At a glance
- Substances
- Berberine and Black Seed Oil
- Pair type
- Caution
- Evidence (highest tier)
- Moderate
- Source citations
- 1 source
- Stack Score effect
- −5 to your Stack Score (per scored caution row).
- Scope
- Supplement × Supplement
- Last verified
- May 30, 2026
Caution · Moderate evidence
Caution
What is happening. Both lower blood glucose, so combined use can produce additive hypoglycemic effects, particularly in people also taking diabetes medications.
Mechanism. Black seed oil (thymoquinone) improves insulin sensitivity and lowers fasting glucose, while berberine activates AMPK and reduces hepatic glucose output; the effects are additive on glycemic control.
Recommendation. Monitor blood glucose more closely when combining. Watch for symptoms of hypoglycemia (shakiness, sweating, confusion) and coordinate with a clinician if on antidiabetic drugs.
Stack Score
How this pair moves the number.
Effect on the composite score
If both Berberine and Black Seed Oil are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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